Pneumatic pump.



PATBNTE'D JAN. 2.2i 1907.

Nof842 i J. FNCK.

PNEUMATIG PUMP.O APPLIO'ATION Hmm oom. 190s.

t if" 6.

nl! Hansis PETERS ca.. wAsHmoraN, A c4 UNITED 'sTATEs PATENT oEEiGE.

JACOB FUNCK, OF ROCHESTER,L NEW YORK, ASSIGNOR TO JUDD & LELAND MANUFACTURING COMPANY, OF CLIFTON SPRINGS,

N EW YORK.

Specification' of Letters Patent.

PNE'UNIATIC PUIVIP.

Patented Jan. 22, 1907.

Application filed October 3, 1906- Serial No. 337,297.

To cir/ZZ whom, t may concern.'

Be it known :that LJACOB FUNorxfcf Roch ester, in the county of Monroe and State .of New York, have invented la new and useful Improvement in Pneumatic Pumps, which improvement is fully .set lforth in the following speciiication and shown -in lthe accompanying drawings.

My invention relates to certain new and useiul improvements in 'pneumatic pistonpumps of theclass designed moreparticularly for inflating hollow vehicle-tires, as of automobiles.

This invention Ahas for its objects, among successively upon separate volumes of air` primarily taken into the outer .barrel at normal atmospheric pressure as such volumes are forced onward toward ythe tire. volumes of air move successively Ionward through the ,chambers of the pump and become increasingly compressed the piston areas .decrease,so that the vair finally acted upon by the last reduced `piston enters kthe tire under high pressure. The pump -is double pistoned, the middle barrel having all the functions of a piston, and in the .operation of the pump .each stroke of .thedouble pistons, whether downward .or upward, serves to compress 4one or more volumes of air, .a given volume of air under high pres sure being forced from the inner lor iinal barrel of the series into v,the tire.

Other objects and advantages of the invention will be `brought l.out and made to appear in the following description and the novel Jfeatures'pointed out in the appended claims, reference -being had to .the accompanying drawings, which, with the referencel numerals marked thereon, form .a Ipart of this speciiication.

Figure 1 is a side Aelevation of .the pump complete. Fig. 2 is aside elevation of .the second lor middle barrel removed. Fig. 3

shows Athe .third or inner barrel detached.

Fig. 4 is a central longitudinal section of the pump with parts broken away. Fig. 5 is a plan of .the base-piece. Fig. 6 is a -plan yof As theing-ring broken away. Fig. 7 is ya plan of vthe foot-piece at the bottom of fthe pump. Fig. 8 is a transverse section of the pump, taken on the dotted line a in Fig. 4. Figs. 1, 2, and1`3 are drawn .to a scale .one-.third size, Figs. 4, 5, 6, and 8 full size, and Fig. 7 ltwothirds size.

Referring to the parts shown, 1 in the various figures is the outer or primary :barrelof .the pump, open at both ends, with its lower end threaded inthe hollow base-piece 2, Figs.

4, 5, and 8, upon a ring of packing material .3. 4, Figs. l and 4, is an annular cap formed with a vcentral bore, threaded upon and partially closing the yupper end ofthe barrel 1.

5, Figs. 2, 4, :and 8, is a secondary-or mid- -dle barrel within .the outer barrel 1, illi-ng with a sliding lit the bore fof the cap 4 and projecting longitudinally out at the top of barrel 1. The barrel .5 is substantially closed at its upper kend yby a head portion r6 and open at its Ylower end and having an annular Aoutwardly-projecting flange 7, smaller indi ameter than .the interionof the barrel 1.

8 Figs. v3, 4, and 8, is a third or inner barrel within the barrels 1 and 5, open at both ends, with its lower end threaded into :an

annular cap 10 threaded thereon.

11 Figs. 4 fand 8, is an axial ,plungenrod within Athe barrel 8., having .a sliding iit in the cap 10 `and threaded in the head 6 `of .the barrel 5, it extending without the latter at the vtop and having an operating cross-handle 12, as appears in Fig. 1.

The barrels 1, 5, and 8 are coaxial and ltogether constitute a series withgraded diameters, the outer and the inner barrelsy l and 8 being rigidlyT connected with the base 2 ,and stationary, and the middle barrel and the piston-rod 5 and '11 being rigidly joined and movable, both being independent of the base 2.

.' The .base 2 is formed with a' laterallyfprojecting .outflow or delivery .tube 13, Figs. 1,

4, 5, :and 8, for the compressed air, with Which to connect a flexible hose leading to lthe nipple of ythe tire rto be inflated. An opening 14 is formed in vthe base ,2, communicating between the interiors ci the tube '13 .and the inner barrel 8 for the passage of the air `from the `latter tothe tire, a ball 15 being Aprovided in the tube to .close the passage IOO against a backflow of air from the tire. The base 2 is further formed with a short downwardly-projecting axial stem 16, threaded in an opening 17 in the upper part of a footpiece or stirrup 18, Figs. 1, 4, and 7, in which the foot of the operator is placed to hold the pump while operating it.

On account of the connections of the parts when the handle 12 is moved alternately upward and downward, the barrel 5,withits attached parts, and the rod 11 withits attached parts, will be reciprocated, respectively, without and within the inner barrel 8, the latter and the outer barrel l being motionless.

The middle barrel 5, which during the operation of the pump acts as a piston-rod, is provided at its inner or lower end with .a flanged piston-head 19, Figs. 4 and 6, threaded in the end of the barrel and holding between it and the flange 7a fibrous packingring 20, as of leather, with downwardlyturned free part or flap to meet the inner surface of the barrel 1. The barrel 5 is also provided with an annular ring 26, Figs. 4 and 8, threaded to place within it above the head 19 and holding with said head an inturned packing-ring 27, with upwardly-turned flap in position to meet the outer surface of the inner barrel 8, as shown. The inner barrel 8 is similarly provided with a piston-head at its upper end, consisting, with the screw-cap 10, of a fibrous ring 21, held between said cap and a ring or flange 22 upon the outer surface of the barrel, the pendent flap of the fibrous ring being in position to meet the inner surface of the middle barrel 5. The rod 11 is also provided at its lower end with a pistonhead, as shown in Fig. 4, consisting of a flange 23 on the reduced lower end of the rod and a nut 24 threaded on the rod, holding between it and the flange a fibrous packing-ring 25, with flap pending over-the nut and in contact with the inner surface of the barrel 8.

Thus a piston-head with fibrous packing-` ring is provided for each barrel 115 8.

l provide a spiral spring 31, Figs. 4 and 8, on `the rod 11 resting upon the flangev 23 in position to encounter the cap 10 of the barrel '8 each time the rod is pulled upward. This ring 2O of the middlebarrel 5 into the space in the barrel 1 beneath. This upward pull of the handle also serves to compress the air in the barrel 5 between the packing-rings 27 and 21, forcing it laterally through openings 29, Figs. 3 and 4, into the interior of the 'inner barrel 8. This body of compressed air passes downward by the flange 23 and the packing-ring 25 into the space of the barrel 8 beneath the said packing-ring 25 as the plunger-rod and the barrel 5 move upward, similarly as a volume of air at normal pressure is simultaneously passing beneath the piston-head 19 into the lower part of the barrel 1, as above set forth. Furthermore, when the barrel 5 and the plunger-rod 11 are at their Lipper positions a downward push upon the handle 12 will compress the air in the barrel 1 beneath the head 19, forcing it upward through the opening 3() in said head and past the packing-ring 27 into the interior of the barrel 5, the external air simultaneously flowing into the barrel 1 through the openings 28 in the cap 4. This domiward push of the handle will also cause the air under a pressure beneath the ring 25 to be further compressed and forced through the passage 14 and the tube 13 int-o the tire. The rings of packing 20, 21, and 25, as seen in Fig. 4, have downturned or pendent parts or flaps, while the fiap of the similar ring 27 turns upward, the construction being such that when the pump is operatedthe air will rush past all the said packing-rings in the directions in which the flaps are turned, but it is prevented from fiowing past any of them in the opposite directions or when moving against the edges of t-he flaps. The middle barrel 5 is provided with idle openings 32 near its upper end inwardly and outwardly, through which air may alternately flow as the barrel is moved upward and downward in the act of pumping. An upward pull of the barrel tends to cause a vacuum therein over the cap 10, which is filled by air flowing inward through said openings 32. A downward movement of the barrel tends to compress the air over the cap 10, which is reeved by the air flowing out through the openings.

From this description of the forms and the operations of the parts of the device it will be understood that at every upward and downward stroke of the movable parts of the pump air is being compressed in some of the apartments thereof,and that at every upward stroke of the parts a fresh supply of air at normal pressure is drawn into the pump and at each downward stroke a volume of air under compression is forced into the tire, there being no valves, as such, 1n the device other t-han the ordinary check-ball 15, as described.

lVhat I claim as my invention, and desire to secure by Letters Patent, is

1. A fluid-pump". consisting of a series of concentric barrels of graded diameters, and au axial plunger-rod with handle, there being a piston for each barrel, the middle barrel and the plunger-rod being rigidly joined and together movable, and the out er and the inner barrels being rigidly connected and stationary.

IIO

2. A uid-pump, such as described, having three concentric cylindrical barrels and an axial pliingerfrod within, a baseepiece rigid with the outer and the inner barrels, the plunger-rod piercing the head f the middle barrel and rigid therewith, the middle barrel having an outer' and an inner packing-ring there being a packing-ring for the inner barrel and a packing-ring for said plunger- 1`0Cl. tr

3. A device of the kind described, having;a

1 a circular base-piece with large and small concentric chambers, abarrel held in said large chamber and an inner barrel held in the small chamber, a third barrel between said outer and inner barrels independent of the base-piece and' having a plunger-head for said outer barrel, and an axial rod with plunger-head for the inner barrel and a plungerehead on the inner barrel for the middle barrel, said barrels and the rod being coaxial.

In witnesswhereof I have hereunto set my hand, this 20th day ot September, 1906, in

the presence of two subscribing witnesses.

JACOB FUNCK.

Witnesses:

E. B. WHITMORE, A. M. WHITMORE, 

